#include <stdio.h>
#include <unistd.h>

int main()
{
    printf("I am running...\n");
    pid_t id = fork();
    
    if(id == 0){ //child
        while(1){
            printf("I am child process...\n");
            sleep(1);
        }
    }
    else if(id > 0){ //parent
        while(1){
            printf("I am parent process...\n");
            sleep(1);
        }
    }
    else { //fork error
    }
    
    return 0;
}
